Resideo V4043A1259 Zone Valve

The Resideo V4043A1259 Zone Valve is a robust, motorized solution engineered for hydronic heating and cooling systems. Specifically designed for controlling high-flow applications, this 3/4" sweat zone valve features a normally closed configuration with a dependable spring return to close mechanism. Operating on 120Vac, the 120V motor is built for long-term reliability in commercial and residential loops. With a flow capacity of 8 Cv and a 8 psi maximum closeoff pressure, this valve ensures efficient fluid movement and tight shut-off. Constructive materials include a forged brass body, stainless steel stem, and Buna-N rubber ball plug, providing superior resistance to wear. The manual opener lever allows for system filling and purging during installation or power failures. Capable of handling fluid temperatures ranging from 40°F to 200°F, the V4043A1259 integrates seamlessly into most hydronic systems via its 18" electrical leads.

• Durable Construction: Features a brass body and stainless steel stem to resist corrosion and mineral buildup.
• Optimized Flow: High 8.0 Cv rating reduces pressure drop across the valve, improving system pump efficiency.
• Fail-Safe Operation: The spring return ensures the valve closes automatically during power loss, preventing overheating or unintended flow.
• Field Use Flexibility: Includes a manual lever for simplified system commissioning and air purging.
• Wide Compatibility: Designed for standard hydronic systems using 120V controls and 3/4" copper piping.

How do I wire a 120V zone valve to a thermostat?
The V4043A1259 utilizes 18-inch lead wires. Since this is a 120V model, ensures your thermostat or relay is rated for line voltage or utilize a transformer-based relay to isolate control signals from the 120Vac motor power.

Can the motor head be replaced without draining the system?
Yes, the powerhead is serviceable. By removing the cover and mounting screws, the motor assembly can be swapped while the brass valve body remains in the line, preventing the need for a full system drain-down.

What is the maximum static pressure this valve can handle?
While the close-off pressure is rated at 8 psi, the valve body is engineered to withstand system pressures up to 125 psi, making it suitable for most multi-story hydronic loops.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.